WASHINGTON — The FBI has begun contacting people as part of an additional background investigation of Judge Brett Kavanaugh, including a second woman who alleges that the Supreme Court nominee sexually assaulted her.

The bureau has reached out to Deborah Ramirez, a Yale University classmate of Kavanaugh’s who alleges that he shoved his genitals in her face at a party where she had been drinking and had become disoriented, her attorney said Saturday.

“She has agreed to cooperate with their investigation,” Ramirez attorney John Clune said in a statement. “Out of respect for the integrity of the process, we will have no further comment at this time.”

President Trump ordered the new background investigation of his nominee Friday under pressure from key members of his party.

The FBI also is following up on allegations by Christine Blasey Ford, a psychology professor at Palo Alto University in California, who testified to the Senate this week that Kavanaugh sexually assaulted her in the early 1980s when they were in high school.

But Michael Avenatti, an attorney for Julie Swetnik, who alleged that Kavanaugh and another boy got teenage girls drunk at parties where the girls were sexually assaulted, sometimes by groups of boys, said Saturday that Swetnik has not been contacted by the bureau.

Swetnik said in a sworn statement last week that she knew Kavanaugh in high school and was raped by such a group at a party where Kavanaugh and Mark Judge were present. She has not accused Kavanaugh of raping her. Swetnik described Kavanaugh as a “mean drunk” in high school who was physically and verbally aggressive with girls.

“We have not heard anything from the FBI, and with each passing hour, I’m growing increasingly concerned that this is a sham of an investigation,” Avenatti said. He noted that Swetnick has had multiple security clearances and said that lying in a sworn declaration would be disastrous to her career.

“Why would Miss Ramirez be questioned, but not my client?” he asked. “Donald Trump is not supposed to be determining who is credible. That’s the job of the FBI.”

The Senate Judiciary Committee on Friday afternoon said the supplemental FBI investigation would be limited to “current credible allegations.” A committee spokesman Saturday declined to elaborate beyond that statement.

Also Saturday, White House spokesman Raj Shah said: “The scope and duration has been set by the Senate. The White House is letting the FBI agents do what they are trained to do.”

Democrats were not included on a call that Republican staff of the Senate Judiciary Committee held with the White House discussing the FBI investigation, according to an official familiar with the discussion.

During Thursday’s testimony, Ford recounted in detail how Kavanaugh and his friend Judge allegedly attacked her in a bedroom during a small gathering at a house when the teenage boys were both drunk. Ford said the alleged attack caused her lasting trauma, and she was visibly anguished as she recalled the events before the Judiciary Committee.

After Ford’s testimony, Kavanaugh vigorously denied the allegations before the committee and accused Democrats of launching a last-minute attempt to derail his nomination. He decried the confirmation process as a “circus.”

The people Ford identified as being at the gathering – Judge, Leland Keyser and Patrick J. Smyth – have said they will cooperate with the FBI.

An attorney for Keyser, a friend of Ford’s, emphasized that Keyser has no recollection of the party where Ford alleges Kavanaugh assaulted her.

“Notably, Ms. Keyser does not refute Dr. Ford’s account, and she has already told the press that she believes Dr. Ford’s account,” the attorney, Howard Walsh III, wrote in an email to the Senate Judiciary Committee. “However, the simple and unchangeable truth is that she is unable to corroborate it because she has no recollection of the incident in question.”

The account of Judge, the high school friend of Kavanaugh who Ford says was in the room during the alleged assault, has been particularly sought after because, unlike Kavanaugh, Judge has not denied Ford’s allegations but has said he has no memory that such an assault occurred.

Ford told the Judiciary Committee that some weeks after the alleged assault, she ran into Judge at a local grocery store where he was working for the summer.

“I said ‘hello’ to him. His face was white and very uncomfortable saying ‘hello’ back,” she said. “He was just nervous and not really wanting to speak with me, and he looked a little bit ill.”

According to Ford, a boy named “PJ” was also at the gathering but not in the room where the alleged assault occurred.

Last week, Patrick J. Smyth, who attended Georgetown Prep school with Kavanaugh, told the judiciary committee that he had no knowledge of the gathering or of any improper conduct by Kavanaugh. On Friday, Smyth said through his lawyer that he was “happy” to cooperate with the investigation.

Kavanugh has denied the accusations by Ramirez and Swetnik and has said emphatically that he never abused or assaulted anyone. He has also pointed to half a dozen other background checks the FBI conducted on him for other federal positions over the years, none of which turned up evidence or allegations of sexual assault.

On Friday, Republicans on the committee voted to proceed to a full Senate vote on Kavanaugh’s nomination, but a series of back-room negotiations led to a surprise twist in what has already been a wrenching confirmation process for a Supreme Court nominee, among the most polarizing in recent memory.

Sen. Jeff Flake, R-Ariz., a key swing vote to confirm Kavanaugh, said he would vote to proceed to a full Senate vote, but that the vote should be preceded by a new, expanded FBI investigation of the allegations against Kavanaugh.

Recognizing that Flake and a handful of other senators’ votes appeared contingent upon the investigation, Republican leaders and the White House relented. Later that day, Trump ordered the investigation and that it be limited in scope and completed by next Friday.

Lawmakers and Trump administration officials had few expectations that the FBI would settle Ford and Kavanaugh’s dueling accounts. A background investigation is, by its nature, more limited than a criminal probe, and FBI agents will not be able to obtain search warrants or issue subpoenas to compel testimony from potential witnesses. The FBI’s interviews, which will take a few days to conduct, won’t turn into a sprawling inquest of everyone Kavanaugh went to a party with in high school, said a person familiar with the investigation.

The FBI’s findings will not necessarily become public. When investigators have completed their work, anything they’ve discovered will be turned over to the White House as an update to Kavanaugh’s background file.